Heejae obviously cares for Garam a lot, but the way he's constantly pushing and pushing for Garam to be "big" is what will ultimately drive them apart. Garam knows that the mark that Heejae has on him is too deep to decipher where he ends and Heejae begins, which is causing him to have an identity crisis. Even when he wants to push away and create distance between him and Heejae, he's always drawn back to Heejae's every word and continues to orbit him.
Tbh all i can hope for is for Garam to create concrete boundaries. From the beginning Garam has appreciated the little things (small concert halls, holiday performances, lesser known musicians, etc...), but Heejae refuses to see that the "little things" matter. Heejae needs to be understanding to what Garam deems as meaningful and allow him freedom to fall and to fly on his own.